Hello World MCP

Minimal Model Context Protocol server written in TypeScript.

What it does

This project starts a stdio-based MCP server with one tool:

• hello returns Hello, world!

Related MCP server: hello-world-mcp

Requirements

• Node.js 18 or newer

• npm

Install

npm install

Build

npm run build

Run

npm start

For development, you can recompile on change with:

npm run dev

Check with MCP Inspector

MCP Inspector is a browser-based tool for testing MCP servers.

1. Build the server first:

   npm run build

2. Start Inspector and point it at the TypeScript source directly:

   npm run inspect

3. Open the Inspector UI in your browser at:

   http://localhost:6274

4. In the Inspector, connect to the server and call the hello tool to verify the response.

This runs Inspector against src/index.ts through tsx, so you can test changes without rebuilding first.

Project files

• src/index.ts contains the MCP server.

• tsconfig.json contains the TypeScript compiler settings.

• package.json contains the scripts and dependencies.